Process for the production of xylenes and light olefins

摘要

In a hydrocarbon upgrading process, a hydrocarbon feed is treated in at least one of a steam cracker, catalytic cracker, coker, hydrocracker, and reformer under suitable conditions to produce a first stream comprising olefinic and aromatic hydrocarbons. A second stream composed mainly of C4 to C12+ olefinic and aromatic hydrocarbons is recovered from the first stream and blended said second stream with a residual fraction from a steam cracker or an atmospheric or vacuum distillation unit to produce a third stream. The third stream is then catalytically pyrolyzed in a reactor under conditions effective to produce a fourth stream having an increased benzene and/or toluene content compared with said second stream and a C3-olefin by-product. The C3-olefin by-product is recovered and benzene and/or toluene are recovered from the fourth stream.

主权项

1. A hydrocarbon upgrading process comprising:
(a) treating a hydrocarbon feed in at least one of a steam cracker, catalytic cracker, coker, hydrocracker, and reformer under suitable conditions to produce a first stream comprising olefinic and aromatic hydrocarbons; (b) recovering from said first stream a second stream composed mainly of C4 to C12 olefinic and aromatic hydrocarbons; (c) blending said second stream with a residual fraction from a steam cracker or an atmospheric or vacuum distillation unit to produce a third stream; (d) catalytically pyrolyzing said third stream in a reactor under conditions effective to produce a fourth stream having an increased benzene and/or toluene content compared with said second stream and a C3-olefin by-product; (e) recovering C3-olefins from said fourth stream; and (f) recovering benzene and/or toluene from said fourth stream.